"Pakistan-based terrorist outfits are constantly trying to set up new modules within the country which is a matter of utmost concern," said Dr Singh.

The Prime Minister further said that while the role of Pakistan-based groups cannot be minimised but the involvement of local elements in the recent blasts adds a new dimension to the terrorist threat.

He suggested better coordination and integration among the existing agencies for devising effective counter-terrorism strategy.

The Prime Minister's statement comes in the wake of the Delhi serial blasts on Saturday and blasts in Jaipur, Bangalore and Ahmedabad earlier this year.